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Observation of Growth Inhibition of Elsinoe fawcettii on Satsuma Mandarin Leaves Pre-treated with Rhizobacterial Strains by a Scanning Electron Microscope
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  • Journal title : Research in Plant Disease
  • Volume 22, Issue 1,  2016, pp.1-8
  • Publisher : Korean Society of Plant Pathology
  • DOI : 10.5423/RPD.2016.22.1.1
 Title & Authors
Observation of Growth Inhibition of Elsinoe fawcettii on Satsuma Mandarin Leaves Pre-treated with Rhizobacterial Strains by a Scanning Electron Microscope
Park, Jae Sin; Song, Min-A; Jeun, Yong Chull;
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 Abstract
Elsinoe fawcettii causing citrus scab was suppressed by rhizobacterial strains such as Burkholderia gladioli MRL408-3, TRH423-3 and Pseudomonas fluorescens THJ609-3, TRH415-2 having antifungal activity. The leaf surface of Satsuma mandarin, which was pre-treated with the rhizobacterial strains, was observed by a scanning electron microscope (SEM) after inoculation with E. fawcettii. The number of lesions was reduced on the leaves pre-treated with the rhizobacterial strains compared to those of untreated leaves. Especially, the lesions numbers was apparently reduced on the leaves pre-treated with B. gladioli MRL408-3. The observation by SEM revealed that not only the germination rate but also the length of germ tube of the pathogen were decreased on the rhizobacterial strains pre-treated leaves. These inhibition of the fungal growth was more strongly expressed on the leaves pre-treated with commercial fungicide imibenconazole, by which the lesions was rarely found on the leaves. Based on these results, it was suggested that rhizobacterial strains may inhibit the germination and growth of the E. fawcettii on the surface of citrus leaves, resulting in decrease of disease severity.
 Keywords
Antibiotic;Bio-fungicide;Biological control;Citrus scab;Ultrastructure;
 Language
Korean
 Cited by
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